JP6094027B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device.

Conventionally, it has been proposed to use a mobile communication device to determine whether or not the current position is a dangerous area, and to perform crime prevention by guiding a moving route (for example, Patent Document 1).
[Prior art documents]
[Patent Literature]
[Patent Document 1] JP 2011-155522 A

  However, the danger zone changes depending on time and circumstances, and a conventional crime prevention system using a portable communication device is not easy to use.

  In one aspect of the present invention, an electronic device is a first detection unit that detects brightness, a second detection unit that detects sound, and a detection result of the first detection unit and the second detection unit. And a third detector for detecting information for performing detection.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

An example of the use environment of the system 5 concerning one Embodiment is shown. An example of the functional block of the smart phone 10, the camera part 100, and the music player 200 is shown typically. An example of the flow which shows the process performed in the system 5 is shown. An example of the flow executed in step S304 is shown. An example of the flow executed in step S310 is shown.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows an example of a usage environment of a system 5 according to an embodiment. The system 5 includes a smartphone 10, a camera unit 100, a music player 200, and a GPS satellite 7. In the system 5, the smartphone 10 is provided in a bag, and the camera unit 100 and the music player 200 are attached to the bag. A part shows a state seen from behind user 6. The smartphone 10 communicates with the camera unit 100 wirelessly. The smartphone 10 communicates with a music player 200 different from the camera unit 100 by radio. Specifically, the smartphone 10 controls the camera unit 100 and the music player 200 wirelessly. The camera unit 100 notifies the smartphone 10 of detection results of various sensors included in the camera unit 100 by radio.

  The smartphone 10 detects the current position of the user 6 by receiving a GPS signal transmitted from the GPS satellite 7 and calculating latitude information and longitude information from the received GSP signal. The smartphone 10 detects the current time with an internal clock function. When it is determined that the user 6 is on the road based on the current position, and the smartphone 10 is determined to be night based on the current time, the smartphone 10 activates the camera unit 100 and starts detecting the surrounding environment. . Specifically, the camera unit 100 detects ambient brightness and ambient sounds.

  When the smartphone 10 determines that the brightness detected by the camera unit 100 is equal to or lower than a predetermined brightness and the volume of the sound detected by the camera unit 100 is smaller than the predetermined volume, The camera unit 100 is caused to detect an approaching person by infrared rays or the like. The smartphone 10 determines the presence or absence of an approaching person based on the detection result in the camera unit 100, and instructs the camera unit 100 to perform imaging when it is determined that an approaching person exists. The smartphone 10 detects a person from the image captured by the camera unit 100. For example, the smartphone 10 notifies the user 6 by the vibration function of the smartphone 10 when an unknown person or a person who needs attention is detected from the image. Further, the smartphone 10 notifies the user 6 by lowering the volume output from the music player 200.

  According to the system 5, the detection operation in the camera unit 100 can be controlled based on the position and time. For this reason, for example, when the user 6 is in a dangerous place at night, the camera unit 100 can start the detection operation at night. In addition, according to the system 5, for example, information for human detection can be detected by the camera unit 100 in a dark and quiet environment. As described above, according to the system 5, it is possible to start sensing of surroundings at an appropriate timing even in an area where the risk changes depending on time, situation, or the like. For this reason, a user-friendly crime prevention system can be provided.

  FIG. 2 schematically illustrates an example of functional blocks of the smartphone 10, the camera unit 100, and the music player 200. Here, the functions and operations of the functional blocks according to the system 5 are shown.

  First, the functional configuration of the smartphone 10 will be described. The smartphone 10 includes a CPU 20, a clock 30, a GPS signal detection unit 40, a face detection unit 50, a memory 60, a vibration unit 70, a speedometer 80, and a communication unit 90.

  The clock 30 measures the date and time and outputs date and time data indicating the measured date and time to the CPU 20. The clock 30 is an example of a time detection unit that detects time. The GPS signal detection unit 40 detects a GPS signal transmitted from the GPS satellite 7 and outputs GPS data indicating the detected GPS signal to the CPU 20. The CPU 20 calculates latitude information and longitude information based on the GSP data detected by the GPS signal detection unit 40. The GPS signal detection unit 40 is an example of a position detection unit that detects a position.

  The face detection unit 50 recognizes a face from the image data. Specifically, the face detection unit 50 recognizes a face from image data captured by the camera unit 100. For example, the face detection unit 50 detects the face of an unknown person or a person who needs attention from the image data captured by the camera unit 100. The face detection unit 50 outputs face detection data indicating a face detection result to the CPU 20.

  The speedometer 80 detects the moving speed of the user 6. For example, the speedometer 80 may include an acceleration sensor, and may detect the walking speed of the user 6 based on acceleration information detected by the acceleration sensor. For example, the speedometer 80 detects vibrations that occur when the user 6 is walking, and detects the number of steps per unit time based on the vibrations. The number of steps per unit time can be applied as an index value of the walking speed of the user 6. The speedometer 80 outputs speed data indicating the detected moving speed to the CPU 20. The speedometer 80 is an example of a speed detection unit that detects the walking speed of the user 6. The CPU 20 functions as a speed acquisition unit that acquires the walking speed of the user 6. Note that the CPU 20 may detect the moving speed of the user 6 based on the time change of the current position based on the GPS information detected by the GPS signal detection unit 40. As described above, the movement speed of the user 6 is detected in order to detect the normal walking speed (average walking speed) of the user 6 and to the detected normal walking speed (average walking speed). This is to detect whether the current walking speed is fast or slow. This is because if the user 6 is tired or concentrates on the music of the music player 200 and the walking speed is slower than usual, the user 6 is in a state of being alert to the surroundings and easily involved in a crime.

  The vibration unit 70 vibrates to notify the user 6 of the danger. The vibration unit 70 vibrates according to the control of the CPU 20. The vibration unit 70 as an example of the drive unit may include a vibration unit that vibrates in accordance with the control of the CPU 20. An example of the vibration unit is a vibration motor. The CPU 20 vibrates the vibration unit 70 according to the detection results of a plurality of detection units such as the clock 30, the GPS signal detection unit 40, the face detection unit 50, and each sensor included in the camera unit 100. Thus, the vibration unit 70 vibrates according to the detection results of the plurality of detection units. The vibration unit 70 is an example of a drive unit that is driven according to detection results of a plurality of detection units.

  The communication unit 90 communicates with the camera unit 100. The communication unit 90 communicates with a music player 200 different from the camera unit 100. The communication unit 90 modulates the transmission data generated by the CPU 20 and sends it out to the outside as a radio signal. In addition, the communication unit 90 demodulates the received radio signal to generate reception data, and outputs the reception data to the CPU 20. As described above, the communication unit 90 can communicate with the camera unit 100 that is provided separately from the GPS signal detection unit 40 and the timepiece 30.

  The CPU 20 controls the entire smartphone 10 and performs control for notifying the user 6 of the danger. The CPU 20 functions as an instruction unit that instructs detection to at least one sensor of the camera unit 100 via the communication unit 90 according to the detection results of the GPS signal detection unit 40 and the timepiece 30. For example, the CPU 20 performs control based on data detected by various sensors such as a clock 30, a GPS signal detection unit 40, a face detection unit 50, and a speedometer 80. Specifically, the CPU 20 generates transmission data for controlling the camera unit 100 and the music player 200 based on date / time data, GPS data, face detection data, speed data, and the like. Further, the CPU 20 controls the face detection unit 50 and the vibration unit 70 based on the reception data received by the communication unit 90.

  The memory 60 is a non-volatile memory (for example, a flash memory), and stores data necessary for each unit of the smartphone 10 to operate. For example, the memory 60 stores programs such as an operating system that the CPU 20 operates, various parameters, and the like. The memory 60 stores map information. For example, the memory 60 stores map information including type information of structures such as buildings and roads existing at the position in association with positions such as latitude and longitude information. The map information may include data related to the road width on the road. Further, the memory 60 stores face information data used for face recognition in the face detection unit 50. In this case, the face data stored in the memory 60 may be stored separately for the face of an acquaintance and the face of a person who needs attention. This is because, as will be described later, the CPU 20 notifies the user 6 according to whether the person approaching from behind is an acquaintance, a person who needs attention, or an unknown person. The face detection unit 50 recognizes the face by comparing the face information data stored in the memory 60 with the image data captured by the camera unit 100.

  The memory 60 stores various detection data detected by the clock 30, the GPS signal detection unit 40, the face detection unit 50, and the speedometer 80. The memory 60 also stores transmission data transmitted from the communication unit 90 and reception data received by the communication unit 90.

  Next, the functional configuration of the camera unit 100 will be described. The camera unit 100 is provided separately from the smartphone 10 and functions as a sensor unit that communicates with the smartphone 10. The camera unit 100 includes a camera 120, an infrared sensor 130, an LED 140, an illuminance meter 150, a microphone 160, and a communication unit 110. In the present embodiment, as shown in FIG. 1, the camera unit 100 is provided behind the user 6, so the camera 120, the infrared sensor 130, the illuminance meter 150, and the microphone 160 are information behind the user 6. It functions as a sensor that acquires The camera 120, the infrared sensor 130, the LED 140, the illuminance meter 150, and the microphone 160 may be collectively referred to as a sensor. Note that an engagement portion that mechanically and electrically engages the smartphone 10 may be provided in the camera portion 100 so that the camera portion 100 can be attached to and detached from the smartphone 10. When the camera unit 100 is engaged with the smartphone 10, the camera unit 100 may be used as a photographing unit of the smartphone 10. In addition, the smartphone 10 and the camera unit 100 may be integrated, or the smartphone 10 may be attached to the back of the user 6. In this case, the communication units 90 and 110 may be omitted.

  The communication unit 110 communicates with an external device. Specifically, the communication unit 110 receives data transmitted from the communication unit 90. The communication unit 110 demodulates the received radio signal and generates reception data. Communication unit 110 outputs a signal for controlling a sensor included in camera unit 100 based on the received data. For example, each sensor starts a detection operation when it receives a signal to start the detection operation. Further, the LED 140 starts light emission when receiving a signal indicating that light emission should be started.

  The illuminometer 150 is a physical quantity sensor that detects illuminance. The illuminometer 150 is an example of a detection unit that detects brightness. The illuminometer 150 can detect the brightness of the place where the user 6 is. The microphone 160 is a physical quantity sensor that detects ambient sounds, and outputs data indicating the detected sounds to the communication unit 110. The microphone 160 is an example of a detection unit that detects sound. The microphone 160 can detect the sound where the user 6 is.

  The communication unit 110 modulates transmission data including data acquired from each sensor included in the camera unit 100 and transmits the modulated data to the outside using a radio signal. For example, the communication unit 110 transmits transmission data to the camera unit 100 as a wireless signal.

  The infrared sensor 130 is an example of a detection unit that detects information for detecting the approach of a person. The infrared sensor 130 detects infrared rays and outputs data indicating the intensity of the infrared rays to the communication unit 110. A pyroelectric sensor can be applied as the infrared sensor 130. The infrared sensor 130 may be a two-dimensional infrared sensor. As a detection method, either an active method or a passive method can be applied. Infrared sensor 130 performs detection according to the detection results of illuminance meter 150 and microphone 160.

  The camera 120 captures a subject and generates image data. The camera 120 outputs the generated image data to the communication unit 110. The camera 120 is an example of an imaging unit. The camera 120 may be a high sensitivity camera. The camera 120 may be an infrared camera. The camera 120 performs detection according to the detection results of the illuminance meter 150 and the microphone 160. The camera 120 is an example of a detection unit that detects information for detecting a person. The camera 120 captures an image when the approach of a person is detected by the detection of the infrared sensor 130.

  The LED 140 operates based on a signal received from the communication unit 110. Examples of the signal supplied to the LED 140 include a signal indicating emission intensity, a signal indicating emission color, a signal indicating temporal change of at least one of the emission intensity and color, and the like. The LED 140 is an example of an output unit. As an output part, the audio | voice output part which outputs an audio | voice etc. other than light emission parts, such as LED140, can be illustrated. The LED 140 emits light when the approach of a person is detected by the detection of the infrared sensor 130.

  As described above, the camera unit 100 (sensor unit) of the present embodiment does not have a memory. This is because the personal information of the user 6 is not leaked even when the camera unit 100 (sensor unit) is dropped or stolen. Even when a memory is provided in the camera unit 100 (sensor unit) (for example, when a buffer memory is provided), the data in the memory is deleted when data is transmitted by the communication unit 110 or after a predetermined time has elapsed (for example, several hours). The data in the memory may be deleted when the casing (not shown) of the camera unit 100 is opened. Further, by not providing a display unit in the camera unit 100 (sensor unit), the data stored in the memory may not be displayed.

  Control of the music player 200 is instructed according to communication with the CPU 20 and the camera unit 100. Specifically, the CPU 20 instructs the control of the music player 200 according to the output of each sensor of the camera unit 100 acquired from the camera unit 100 by communication.

  A functional configuration of the music player 200 will be described. The music player 200 includes a CPU 220, a volume control unit 230, and a communication unit 210.

  The communication unit 210 communicates with the smartphone 10. The volume control unit 230 controls the volume output from the music player 200 under the control of the CPU 220. Specifically, the volume control unit 230 reduces the volume output from the music player 200. The volume controller 230 may temporarily stop the output of the sound from the music player 200 over a predetermined period.

  Specifically, the communication unit 210 receives data transmitted from the communication unit 90. The communication unit 210 demodulates the received radio signal to generate reception data, and outputs it to the CPU 220. CPU 220 controls volume control unit 230 based on the received data. For example, the CPU 220 outputs a signal for controlling the volume to the volume control unit 230. In addition, the CPU 220 outputs transmission data addressed to the smartphone 10 to the communication unit 210. The communication unit 210 modulates the received transmission data and sends it to the outside as a radio signal. Examples of transmission data addressed to the smartphone 10 include current volume information.

  For wireless communication applicable to wireless communication in the communication unit 90, the communication unit 110, and the communication unit 210, wireless communication based on various wireless communication standards such as short-range wireless communication standards such as Bluetooth (registered trademark) can be applied.

  FIG. 3 shows an example of a flow showing processing executed in the system 5. In step S <b> 302, the CPU 20 of the smartphone 10 acquires date / time data from the clock 30 and also acquires GPS data from the GPS signal detection unit 40 to confirm the current time and position status. Specifically, the CPU 20 specifies the current time from the date / time data. Further, the CPU 20 specifies the current position from the GPS data. In addition, the CPU 20 acquires map information stored in the memory 60. The map information includes road information such as road width information. The CPU 20 specifies the type of the structure at the current position based on the map information and the current position. Further, when the current position is on the road, the CPU 20 may specify the width of the road at the current position based on the map information.

  In step S <b> 304, the CPU 20 determines whether to activate the camera unit 100. For example, the CPU 20 determines whether to activate the camera unit 100 based on the current time and the current position. Details of this processing will be described with reference to FIG.

  If it is determined in step S304 that the camera unit 100 is to be activated, the illuminance meter 150 and the microphone 160 are turned on to start detection by the illuminance meter 150 and the microphone 160 (step S306). Specifically, the CPU 20 causes the communication unit 90 to transmit transmission data for turning on the illuminance meter 150 and the microphone 160 to the camera unit 100 by wireless communication.

  Subsequently, in step S308, the CPU 20 checks the surrounding situation. Specifically, the CPU 20 acquires data indicating the illuminance detected by the illuminance meter 150 and data indicating the sound detected by the microphone 160 from the camera unit 100 by wireless communication.

  In step S310, the CPU 20 determines whether to detect an approaching object. Specifically, the CPU 20 determines whether to perform detection of an approaching object based on the confirmation result in step S308. Details of this processing will be described with reference to FIG.

  When it is determined in step S310 that the approaching object from the back of the user 6 is to be detected, the camera unit 100 turns on the infrared sensor 130 and starts detecting the approaching object by the infrared sensor 130 (step S312). ). Specifically, the CPU 20 causes the communication unit 90 to transmit transmission data for turning on the infrared sensor 130 to the camera unit 100 by wireless communication. Infrared sensor 130 starts detection according to the detection results of illuminometer 150 and microphone 160.

  Subsequently, in step S314, the CPU 20 determines whether there is an approaching object. For example, the CPU 20 determines the presence or absence of an approaching object based on detection data of the infrared sensor 130 acquired from the camera unit 100 by wireless communication. For example, the CPU 20 determines the presence or absence of an approaching object based on the time change of detection data from the infrared sensor 130. For example, the CPU 20 determines the presence or absence of an approaching object based on the time change of the infrared intensity. The CPU 20 determines that an approaching object exists when the infrared intensity increases with time. Further, when the infrared sensor 130 is a two-dimensional infrared sensor, the CPU 20 determines the presence or absence of an approaching object based on the temporal change of the two-dimensional infrared luminance information. For example, the presence / absence of an approaching object is determined based on the temporal change in the size of the object extracted from the infrared image. More specifically, it is determined that an approaching object exists when the size of an object having a predetermined shape increases with time.

  When it is determined in step S314 that there is an approaching object, the camera unit 100 starts imaging (step S316). Specifically, the CPU 20 causes the communication unit 90 to transmit transmission data for instructing the camera 120 to start imaging to the camera unit 100 by wireless communication. As described above, the CPU 20 instructs the camera 120, which is a detection unit different from the illuminance meter 150, the microphone 160, and the infrared sensor 130, according to the detection result of the infrared sensor 130.

  Subsequently, the camera unit 100 turns on the LED 140 (step S318). Specifically, the CPU 20 causes the communication unit 90 to transmit the transmission data for lighting the LED 140 to the camera unit 100 by wireless communication. The CPU 20 may cause the LED 140 to emit light with a light emission intensity of 50% of the maximum light emission intensity that the LED 140 can emit. CPU20 may transmit the transmission data containing the information which shows the emitted light intensity which LED140 is made to light-emit. Further, the CPU 20 may transmit transmission data for instructing the light emission pattern to be emitted by the LED 140 to the camera unit 100. Thus, the CPU 20 can instruct the LED 140 to output in accordance with detection results of sensors such as the clock 30, the face detection unit 50, the illuminance meter 150, the microphone 160, the infrared sensor 130, and the camera 120. In particular, when an approaching object is detected by the infrared sensor 130, the LED 140 is caused to emit light according to the detection result of the infrared sensor 130. For this reason, it is possible to notify the approaching person that the user 6 is aware of the approaching person behind by turning on the LED 140 at an appropriate timing according to the surrounding situation. Further, the CPU 20 can notify the surroundings that it is not a sneak shot by turning on the LED 140 when taking an image with the camera unit 100.

  Subsequently, in step S320, it is determined whether to notify the user 6 or not. Specifically, the CPU 20 acquires image data obtained by imaging with the camera 120 from the camera unit 100 by wireless communication, and the face data is stored in the memory 60 based on the acquired image data. It is determined that the user 6 is notified when the person is not a stranger or is a person who is registered as a person requiring attention in the memory 60.

  If it is determined to notify the user 6 in the determination of S320, the user is notified (step S322), and this process is terminated. For example, in step S322, the CPU 20 vibrates the vibration unit 70. Further, the CPU 20 notifies the user 6 by lowering the volume of the music player 200. Specifically, the CPU 20 causes the communication unit 90 to transmit transmission data for decreasing the volume to the music player 200 by wireless communication. The CPU 20 may decrease the volume of the music player 200 on condition that the current volume output from the music player 200 is equal to or higher than a predetermined volume. Further, the CPU 20 may output sound from an external speaker of the music player 200 to the outside.

  If it is determined in step S320 that notification to the user 6 is not to be executed, the process proceeds to S302. Also, if it is determined in step S310 of this flow that the approaching object is not detected, the process proceeds to step S302. If it is determined in step S314 of this flow that there is no approaching object, the process proceeds to step S302. If it is determined in step S304 in this flow that the camera unit 100 is not activated, the camera 120, the infrared sensor 130, the illuminance meter 150, and the microphone 160 provided in the camera unit 100 are turned off (step S324). ), The process proceeds to step S302.

  FIG. 4 shows an example of the flow executed in step S304. Following step S302, the CPU 20 determines whether it is nighttime based on the current time (step S402). For example, the CPU 20 determines that it is nighttime when the current time is after 19:00. Further, the CPU 20 determines that it is nighttime when the current time is before 6 o'clock. In this way, the CPU 20 determines that it is night when the current time belongs to a time zone that is predetermined as a night time zone.

  If it is determined in step S402 that it is nighttime, it is determined whether or not the current position is inside the building (step S404). Specifically, the CPU 20 determines whether or not the current position is in a building based on the current position and map information stored in the memory 60. If it is determined in step S404 that it is not in the building, the process proceeds to step S306. If it is determined in step S404 that it is in the building, the process proceeds to step S324. If it is determined in step S402 that it is not nighttime, the process proceeds to step S324.

  As described above, the CPU 20 determines that the camera unit 100 is to be activated when it is determined that it is nighttime and the user 6 is outside the building. For this reason, using the time and place information, the camera unit 100 can be activated at an appropriate timing to cause the illuminometer 150 and the microphone 160 to start detection. As described above, the CPU 20 instructs the illuminometer 150 and the microphone 160 included in the camera unit 100 to perform detection via the communication unit 90 in accordance with the position detection result and the time detection result.

  In step S404, in addition to determining whether or not the vehicle is inside the building, the CPU 20 may determine whether or not the road width at the current position is greater than or equal to a predetermined value (for example, several meters). If it is determined that the road width at the current position is not equal to or greater than a predetermined value, the process may proceed to step S306. When it is determined that the road width at the current position is smaller than a predetermined value, the process may proceed to step S306. In this way, the CPU 20 can instruct the illuminometer 150 to detect based on the road width data. In addition, the CPU 20 can instruct the microphone 160 to perform detection based on the road width data. This is because crimes such as snatching often occur when turning from a wide road to a narrow road. Therefore, the CPU 20 performs the process of step S306 when the user 6 moves from a relatively wide road to a narrow road from the detection result of the GPS signal detection unit 40 and the road width data stored in the memory 60. You may proceed. In this case, when the walking speed of the user 6 is equal to or lower than the normal walking speed (average walking speed), the CPU 20 proceeds with the process of step S6, and the walking speed of the user 6 is higher than the normal walking speed (average walking speed). If it is too fast, the process of step S306 may not be performed.

  Further, the CPU 20 ends the flowchart of FIG. 3 when the user 6 moves from a narrow road to a wide road or when the walking speed of the user 6 is about 15% faster than the normal walking speed (average walking speed). It may be.

  FIG. 5 shows an example of the flow executed in step S310. Subsequent to step S308, the CPU 20 determines whether or not the illuminance detected by the illuminometer 150 is equal to or less than a predetermined illuminance reference value (step S502). If it is determined in step S502 that the illuminance is not more than the reference value, it is determined in step S504 whether the volume detected by the microphone 160 is not more than a predetermined reference value (step S504). If it is determined in step S504 that the detected volume is equal to or lower than a predetermined reference value, the process proceeds to step S312.

  If it is determined in step S504 that the detected volume exceeds a predetermined reference value, the process proceeds to step S302. If it is determined in step S502 that the detected illuminance exceeds the predetermined illuminance reference value, the process also proceeds to step S302.

  As described above, the CPU 20 causes the infrared sensor 130 to detect an approaching object when the detected illuminance is equal to or lower than the predetermined reference illuminance and the detected sound volume is equal to or lower than the predetermined reference sound volume. Judge. For this reason, the infrared sensor 130 detects a person when the illuminance meter 150 detects a brightness equal to or lower than a predetermined brightness, and the microphone 160 detects a sound volume equal to or lower than a predetermined value. Information can be detected. For this reason, detection of an approaching object can be started at an appropriate timing, as in a dark and quiet place. As described above, the CPU 20 instructs the infrared sensor 130 different from the illuminometer 150 to perform detection according to the detection result of the illuminometer 150. Further, the CPU 20 instructs the infrared sensor 130 different from the illuminance meter 150 and the microphone 160 to perform detection according to the detection result of the microphone 160.

  Here, when the brightness below the predetermined brightness is detected and the sound volume below the predetermined value is detected, the infrared sensor 130 is made to detect. However, the CPU 20 may cause the infrared sensor 130 to detect depending on the type of sound detected by the microphone 160. For example, the CPU 20 may cause the infrared sensor 130 to detect when a sound having a frequency that meets a predetermined condition is detected. An example of the frequency that meets the predetermined condition is the frequency of footsteps such as shoe sounds. Further, examples of frequencies that meet predetermined conditions include frequencies such as engine sounds and motor sounds of vehicles such as trains and motorcycles, and traveling sounds of vehicles. This is to detect a situation when a surrounding sound (for example, scream) is drowned out due to noise from a train or the like in addition to a sudden approach of a motorcycle. That is, the infrared sensor 130 detects information for detecting a person when the illuminance meter 150 detects a brightness equal to or lower than a predetermined brightness and the microphone 160 detects a predetermined type of sound. May be detected.

  Further, the CPU 20 may cause the infrared sensor 130 to detect when there is a predetermined change in brightness and there is a predetermined change in sound. That is, the infrared sensor 130 is information for detecting a person when there is a predetermined change in the brightness detected by the illuminance meter 150 and there is a predetermined change in the sound detected by the microphone 160. May be detected. For example, the infrared sensor 130 may detect when the brightness suddenly increases and the sound suddenly increases. For this reason, it is possible to appropriately detect a change in the surrounding environment that may be caused by a vehicle such as a train or a motorcycle, and to start detection by the infrared sensor 130.

  According to the system 5, even in an area where the risk changes depending on time, situation, etc., the sensor that detects the surrounding environment can start detection at an appropriate timing. And according to the detection result of the sensor which started the detection, the other sensors can be made to start the detection sequentially at an appropriate timing. And according to the detection result by various sensors, a user 6 can be notified of a detection result at a required timing. For this reason, a user-friendly crime prevention system can be provided.

  In the above description, the infrared sensor 130 has been exemplified as a detection unit for detecting the approach of a person. As a detection unit for detecting the approach of a person, various sensors other than the infrared sensor 130 such as an ultrasonic sensor can be applied. Various sensors that can measure the position and distance can be applied as the detection unit. For example, a laser distance sensor or the like can be applied as the detection unit.

  In the above description, the smartphone 10 includes the speedometer 80. However, the speedometer may be provided in an external device other than the smartphone 10, such as the camera unit 100. And the smart phone 10 may acquire the information which shows the speed measured with the said external apparatus by communication.

  In the above description, the CPU 20 acquires and analyzes the detection result of each sensor included in the camera unit 100, and the detection operation of each sensor of the camera unit 100 is controlled by an instruction from the CPU 20. However, the camera unit 100 may have the function of the CPU 20. For example, the camera unit 100 may analyze the detection results of the illuminance meter 150 and the microphone 160 and cause the infrared sensor 130 to perform detection according to the analysis results.

  In the above description, the processing described as the operation of the CPU 20 is realized by the CPU 20 controlling each hardware of the smartphone 10 according to a program. The processing described as the operation of the CPU 220 is realized by the CPU 220 controlling each hardware of the music player 200 according to the program. The same applies to the function of the camera unit 100. That is, the processing described in relation to the smartphone 10, the camera unit 100, the music player 200, and the like according to the present embodiment is performed by each processor including a processor, a memory, and the like when the processor operates according to a program and controls each hardware. It can be realized by the hardware and the program operating in cooperation. That is, the process can be realized by a so-called computer device. The computer device may load a program for controlling the execution of the above-described process, operate according to the read program, and execute the process. The computer device can load the program from a computer-readable recording medium storing the program.

  Note that the function of the smartphone 10 can be incorporated into various electronic devices. For example, the function of the smartphone 10 can be incorporated in a personal computer, a camera, a video camera, an audio recorder, a clock, and the like including not only a smartphone but also an information portable terminal such as a mobile phone and a PDA, a portable game device, a tablet, and the like. it can. Further, the function of the smartphone 10 can be incorporated in the music player 200 itself. The function of the camera unit 100 can also be incorporated into various electronic devices. For example, by incorporating the function of the camera unit 100 into an accessory such as a hair clip, the accessory can be applied as an electronic device. Note that some of the detection functions of the camera unit 100 may be provided in an electronic device separated from an electronic device in which other sensors are provided. For example, the function of the camera 120 may be provided in an electronic device separated from other sensors. Of the functions of the camera unit 100, at least the camera 120 is desirably provided at a position where at least the back of the user 6 can be imaged. In addition, the infrared sensor 130 is also preferably provided at a position where at least the back of the user 6 can be detected. However, it goes without saying that the detection range by the camera 120 and the infrared sensor 130 is not limited to the back of the user 6. The music player 200 is not limited to an electronic device used for music playback. The function of the music player 200 can be incorporated into various audio reproducing devices such as an audio recorder with an audio reproducing function.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

  5 systems, 6 users, 7 GPS satellites, 10 smartphones, 20 CPUs, 30 clocks, 40 GPS signal detection units, 50 face detection units, 60 memories, 70 vibration units, 80 speedometers, 90 communication units, 100 camera units, 110 Communication unit, 120 camera, 130 infrared sensor, 140 LED, 150 illuminometer, 160 microphone, 200 music player, 220 CPU, 230 volume control unit, 210 communication unit

Claims (11)

A first detection unit for detecting brightness;
A second detection unit for detecting sound;
When the first detection unit detects brightness below a predetermined brightness, the second detection unit detects a volume below a predetermined value, and detects a predetermined type of sound generated by a person, the approach of the person A third detector for starting detection of information for detecting
Based on a detection result of the third detecting unit, if the person is determined to be close, and a control unit that determines to implement the volume control of the audio reproduction apparatus,
Electronic equipment comprising. The electronic apparatus according to claim 1 , wherein the predetermined type of sound is a sound having a predetermined frequency . The electronic device according to claim 1, wherein the third detection unit includes an infrared sensor. The electronic device according to claim 1, wherein the third detection unit includes an imaging unit. The third detection unit has a predetermined change in brightness detected by the first detection unit, and when there is a predetermined change in the sound detected by the second detection unit, The electronic apparatus according to claim 1, wherein information for detection is detected. The electronic device according to claim 1, further comprising a light emitting unit that emits light according to a detection result of the third detection unit. The electronic device according to claim 1, further comprising a communication unit capable of communicating with an external device. The electronic device according to claim 7, further comprising a deletion unit that deletes data communicated by the communication unit. The electronic device according to claim 7, further comprising an engaging portion that is detachably engaged with the external device.   The electronic device according to claim 1, wherein the volume control is a control for decreasing a volume. A communication unit that communicates with the audio reproduction device;
The electronic device according to any one of claims 1 to 10, wherein when the control unit determines to perform volume control, information that instructs execution of the volume control is transmitted to the audio reproduction device via the communication unit. .

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